This page provides the complete FANUC serial spindle alarm list (final section), covering alarm codes from SP9110 to SP9216.
These alarms mainly relate to:
- Power supply (PS) faults
- Communication errors
- Safety system issues
- Hardware failures and protection functions
This section is essential for advanced troubleshooting and maintenance of FANUC CNC systems.
FANUC Spindle Alarm List (SP9110–SP9216)
1) SP9110 – SP9113
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9110 | Amplifier Communication Error | B0 | Communication failure between spindle amplifier and power supply | Replace communication cable or unit |
| SP9111 | Inverter Control Voltage Low | B1 | Control voltage of power supply is low | Replace power supply |
| SP9112 | Regenerative Power Too Large | B2 | Excessive regenerative power | Check resistor and motor selection |
| SP9113 | Inverter Cooling Fan Failure | B3 | Cooling fan stopped | Replace cooling fan |
2) SP9120 – SP9129
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9120 | Communication Data Error | C0 | Communication abnormal between CNC and amplifier | Replace cable or board |
| SP9121 | Communication Data Error | C1 | Communication abnormal | Replace cable or board |
| SP9122 | Communication Data Error | C2 | Communication abnormal | Replace cable or board |
| SP9123 | Spindle Switching Circuit Error | C3 | Auxiliary module abnormal | Check connection or replace module |
| SP9124 | Learning Control Command Error | C4 | Invalid speed command during learning | Adjust speed or parameters |
| SP9125 | Learning Compensation Count Error | C5 | Compensation parameter out of range | Adjust parameters No.4427/4428 |
| SP9126 | Spindle Speed Limit Exceeded | C6 | Speed exceeds limit | Check parameter No.4512 |
| SP9127 | Learning Cycle Error | C7 | Incorrect learning cycle division | Adjust parameter No.4425 |
| SP9128 | Sync Speed Deviation Too Large | C8 | Speed deviation too large | Check sequence and parameters |
| SP9129 | Sync Position Deviation Too Large | C9 | Position deviation too large | Check sequence and cutting condition |
3) SP9130 – SP9139
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9130 | Torque Polarity Error | D0 | Opposite rotation direction in tandem control | Check parameter No.4353 |
| SP9131 | Spindle Adjustment Alarm | D1 | Adjustment function alarm | Refer to SERVO GUIDE |
| SP9132 | Serial Sensor Data Error | D2 | Sensor communication error | Apply noise countermeasure or replace cable |
| SP9133 | Serial Sensor Transmission Error | D3 | Data transmission failure | Replace cable or sensor |
| SP9134 | Serial Sensor Phase Error | D4 | Abnormal position data change | Adjust sensor parameters |
| SP9135 | Safe Speed Zero Error | D5 | Motor exceeds safe zero-speed range | Operate within safe range |
| SP9136 | Safe Speed Zero Mismatch | D6 | CNC and amplifier mismatch | Replace amplifier |
| SP9137 | Device Communication Error | D7 | Internal communication abnormal | Check PCB or replace amplifier |
| SP9138 | Current Limit Parameter Error | D8 | Parameter out of range | Adjust No.4527/4530 |
| SP9139 | Serial Sensor Pulse Loss | D9 | Sensor pulse loss | Replace sensor |
4) SP9140 – SP9161
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9140 | Sensor Count Loss | E0 | Pulse count out of range | Replace sensor |
| SP9141 | No One-turn Signal | E1 | One-turn signal not detected | Replace cable or sensor |
| SP9142 | Serial Sensor Error | E2 | Sensor abnormal | Replace sensor |
| SP9143 | Cs Axis Switching Error | E3 | Command issued before signal ready | Check sequence |
| SP9144 | Current Detection Circuit Error | E4 | Circuit abnormal | Replace amplifier |
| SP9145 | Drive Power Voltage Low | E5 | Voltage drop | Replace amplifier |
| SP9146 | Internal Overheat | E6 | Amplifier temperature too high | Improve cooling or replace |
| SP9147 | Ground Fault | E7 | Ground fault detected | Replace motor or cable |
| SP9148 | Axis Number Not Set | E8 | Axis not configured | Restart system |
| SP9149 | Current Feedback U Offset | E9 | Circuit abnormal | Replace amplifier |
| SP9150 | Current Feedback V Offset | F0 | Circuit abnormal | Replace amplifier |
| SP9151 | Filter Module Error | F1 | Filter module failure | Replace module |
| SP9152 | Current Feedback Disconnect | F2 | Cable disconnection | Replace cable |
| SP9153 | No Failure (Self-check) | F3 | No hardware issue detected | Check parameters |
| SP9154 | Phase Open | F4 | Motor or cable open circuit | Replace motor/cable |
| SP9155 | Spindle Failure (Open) | F5 | Power device failure | Replace amplifier |
| SP9156 | Current Control Failure | F6 | Current detection abnormal | Replace amplifier |
| SP9157 | Spindle Failure (Short) | F7 | Power device short circuit | Replace amplifier |
| SP9159 | Function Code Mismatch | F9 | Software inconsistency | Restart CNC |
| SP9160 | Thermistor Disconnect | G0 | Thermistor disconnected | Replace amplifier |
| SP9161 | Motor Power Line Short | G1 | Short circuit detected | Replace motor or cable |
5) SP9200 – SP9216
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9200 | PS Ground Fault | — | Ground fault in motor or cable | Replace components |
| SP9201 | PS Overcurrent 2 | — | Power supply overcurrent | Replace PS |
| SP9202 | PS Overcurrent 3 | — | Power supply overcurrent | Replace PS |
| SP9203 | PS Overcurrent 4 | — | Power supply overcurrent | Replace PS |
| SP9204 | PS Soft Thermal | — | Power supply overload | Adjust cutting condition |
| SP9205 | DC LINK Overvoltage 2 | — | Overvoltage detected | Replace PS |
| SP9206 | DC LINK Overvoltage 3 | — | Overvoltage detected | Replace PS |
| SP9207 | DC LINK Overvoltage 4 | — | Overvoltage detected | Replace PS |
| SP9208 | DC LINK Voltage Low 2 | — | Voltage drop detected | Replace PS |
| SP9209 | DC LINK Voltage Low 3 | — | Voltage drop detected | Replace PS |
| SP9210 | DC LINK Voltage Low 4 | — | Voltage drop detected | Replace PS |
| SP9211 | Illegal Parameter | — | Invalid parameter setting | Correct parameters |
| SP9212 | Hardware Error | — | Power supply hardware failure | Replace PS |
| SP9213 | Sub Module Error 1 | — | Auxiliary module failure | Replace module |
| SP9214 | Sub Module Error 2 | — | Auxiliary module failure | Replace module |
| SP9215 | Sub Module Error 3 | — | Auxiliary module failure | Replace module |
| SP9216 | Sub Module Error 4 | — | Auxiliary module failure | Replace module |
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Reference Source: Beijing FANUC. This article is based on technical documentation provided by Beijing FANUC.
For More Fanuc CNC repair Cases and technical articles, please back to Fanuc Technical Support Center.
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